Gas sensing properties of layer-by-layer self-assembled ultrathin film of polyaniline/titanium dioxide

2012 ◽  
Vol 162 (24) ◽  
pp. 2242-2249 ◽  
Author(s):  
Qianqian Lin ◽  
Yang Li ◽  
Mujie Yang
Keyword(s):  
Titanium Dioxide ◽  
Gas Sensing ◽  
Ultrathin Film ◽  
Layer By Layer ◽  
Sensing Properties ◽  
Gas Sensing Properties ◽  
Self Assembled

scholarly journals Acetylene Gas-Sensing Properties of Layer-by-Layer Self-Assembled Ag-Decorated Tin Dioxide/Graphene Nanocomposite Film

Nanomaterials ◽  
2017 ◽  
Vol 7 (9) ◽  
pp. 278 ◽  
Author(s):  
Chuanxing Jiang ◽  
Dongzhi Zhang ◽  
Nailiang Yin ◽  
Yao Yao ◽  
Talgar Shaymurat ◽  
...  
Keyword(s):  
Nanocomposite Film ◽  
Tin Dioxide ◽  
Gas Sensing ◽  
Layer By Layer ◽  
Sensing Properties ◽  
Gas Sensing Properties ◽  
Graphene Nanocomposite ◽  
Self Assembled

Photoluminescence and Hydrogen Gas-Sensing Properties of Titanium Dioxide Nanostructures Synthesized by Hydrothermal Treatments

2012 ◽  
Vol 4 (3) ◽  
pp. 1656-1665 ◽  
Author(s):  
Lucky M. Sikhwivhilu ◽  
Siyasanga Mpelane ◽  
Bonex W. Mwakikunga ◽  
Suprakas Sinha Ray
Keyword(s):  
Titanium Dioxide ◽  
Gas Sensing ◽  
Hydrogen Gas ◽  
Sensing Properties ◽  
Gas Sensing Properties

scholarly journals Hydrophilicity and carbon chain length effects on the gas sensing properties of chemoresistive, self-assembled monolayer carbon nanotube sensors

2019 ◽  
Vol 10 ◽  
pp. 565-577 ◽  
Author(s):  
Juan Casanova-Cháfer ◽  
Carla Bittencourt ◽  
Eduard Llobet
Keyword(s):  
Carbon Nanotubes ◽  
Nitrogen Dioxide ◽  
Photoelectron Spectroscopy ◽  
Gas Sensing ◽  
Carbon Chain ◽  
Head Group ◽  
Carbon Chain Length ◽  
Sensing Properties ◽  
Gas Sensing Properties ◽  
Self Assembled

Here we describe the development of chemoresistive sensors employing oxygen-plasma-treated, Au-decorated multiwall carbon nanotubes (MWCNTs) functionalized with self-assembled monolayers (SAMs) of thiols. For the first time, the effects of the length of the carbon chain and its hydrophilicity on the gas sensing properties of SAMs formed on carbon nanotubes are studied, and additionally, the gas sensing mechanisms are discussed. Four thiols differing in the length of the carbon chain and in the hydrophobic or hydrophilic nature of the head functional group are studied. Transmission electron microscopy, Raman spectroscopy and X-ray photoelectron spectroscopy are used to analyze the resulting gas-sensitive hybrid films. Among the different nanomaterials tested, short-chain thiols having a hydrophilic head group, self-assembled onto Au-decorated carbon nanotubes were most responsive to nitrogen dioxide and ethanol vapors, even in the presence of ambient humidity. In particular, this nanomaterial was about eight times more sensitive to nitrogen dioxide than bare Au-decorated carbon nanotubes when operated at room temperature. This response enhancement is attributed to the interaction, via strong hydrogen bonding, of the polar molecules tested to the polar surface of hydrophilic thiols. The approach discussed here could be extended further by combining hydrophilic and hydrophobic thiol SAMs in Au-MWCNT sensor arrays as a helpful strategy for tuning sensor response and selectivity. This would make the detection of polar and nonpolar gas species employing low-power gas sensors easier, even under fluctuating ambient moisture conditions.

Facile synthesis and gas sensing properties of tubular hierarchical ZnO self-assembled by porous nanosheets

2015 ◽  
Vol 215 ◽  
pp. 231-240 ◽  
Author(s):  
Faying Fan ◽  
Pinggui Tang ◽  
Yuanyuan Wang ◽  
Yongjun Feng ◽  
Aifan Chen ◽  
...  
Keyword(s):  
Gas Sensing ◽  
Facile Synthesis ◽  
Sensing Properties ◽  
Porous Nanosheets ◽  
Gas Sensing Properties ◽  
Self Assembled
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